CN115189763A - TDC (time-to-digital converter) -based quantum pulse interception method and quantum key distribution system - Google Patents
TDC (time-to-digital converter) -based quantum pulse interception method and quantum key distribution system Download PDFInfo
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
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Abstract
The invention discloses a quantum pulse interception method of a TDC, which comprises the following steps: s1, when the detector is detected to have optical pulse signal response, pulse counting is carried out, and meanwhile, a TDC intercepts the response time t of the optical pulse j (ii) a S2, based on the response time t j Calculating the pulse serial number i of the current light pulse, and determining the time window t where the effective signal segment of the current light pulse i is located based on the pulse serial number i K; s3, detecting time t j Whether or not to lie within the time window t i And +/-k, if the detection result is yes, the pulse counting is determined to be valid, otherwise, the pulse counting is trailing generation, and the pulse counting is determined to be invalid. The invention proceeds the response time of the detector through the TDCThe high-precision measurement is carried out, the optical pulse signals are intercepted according to a specific time window, the pulse trailing influence can be eliminated, the quality of detection counting is improved, the bit error rate of a quantum key distribution system is reduced, and the safety key generation rate of the quantum key distribution system is further improved.
Description
Technical Field
The invention belongs to the technical field of quantum key distribution, and particularly relates to a quantum pulse interception method based on a TDC (time-to-digital converter) and a quantum key distribution system.
Background
With the rapid development of modern communication technology, the communication environment is more and more complex, the problem of communication security is increasingly aggravated, and various industries pay more and more attention to communication security. At present, the most common RSA encryption algorithm is difficult to ensure the safety under the impact of quantum computation. The quantum secret communication is based on the basic law of quantum mechanics, quantum non-clonality and the Heisenberg inaccurate measurement principle, the unconditional safety of quantum passwords is guaranteed by encrypting information in a one-time pad mode, and the application of a quantum key distribution technology is increasingly wide.
Common encoding methods in the quantum key distribution technology mainly include polarization encoding and phase encoding. In the quantum key distribution of the polarization coding optical fiber transmission scheme, due to the inherent birefringence effect of the optical fiber in a channel, the polarization state of photons can be changed randomly in the transmission process, the influence of the external environment is large, the polarization state of photons reaching a receiving end cannot be predicted, and if the photons are measured according to the appointed polarization direction, wrong detection results can be generated, so that the problems of short transmission distance, high error rate and the like are caused. And the quantum key distribution system using the phase coding scheme can eliminate the influence of polarization disturbance in the optical fiber channel on the system, and has stronger environmental robustness. Therefore, a commonly used quantum key distribution scheme mainly using phase encoding is to encode the phase difference of photons to transfer key information. However, the technical scheme of quantum key distribution using phase encoding is adopted, and the overall performance of the system is directly affected by whether the pulse count detected by the detector is accurate or not. The part of signal phase information sending end and receiving end of signal tailing is not modulated, the detector response counting caused by the part does not accord with an interference formula, the error rate is 50% under the condition of complete randomness, the error rate difference with the normal detection counting is large, therefore, the pulse counting caused by the signal tailing greatly reduces the error rate of a quantum key distribution system, further reduces the key generation rate, and seriously influences the randomness of code forming.
Disclosure of Invention
The invention provides a quantum pulse interception method of a TDC, aiming at improving the problems.
The invention is realized in this way, a quantum pulse interception method of TDC, which specifically comprises the following steps:
s1, when the detector is detected to have optical pulse signal response, pulse counting is carried out, and meanwhile, a TDC intercepts the response time t of the optical pulse j ；
S2, based on the response time t j Calculating the pulse serial number i of the current light pulse, and determining the time window t where the effective signal segment of the current light pulse i is located based on the pulse serial number i ±k；
S3, detecting time t j Whether or not to lie within the time window t i And +/-k, if the detection result is positive, the pulse counting is determined to be valid, otherwise, the pulse counting is tailing generation, and the pulse counting is determined to be invalid.
Further, based on the response time t of the current light pulse j Calculating the serial number i of the current pulse, wherein the calculation formula is as follows:
wherein, t 0 The time difference between the detection of the light pulse by the receiving end and the detection of the light pulse by the detector is represented, and T is the pulse period.
Furthermore, the time window t is located by the valid signal segment of the current optical pulse i i The specific method for determining +/-k is as follows:
s21, calculating the time center point t of the current light pulse i detected by the detector i ，；
S22, the time window of the effective signal section of the current optical pulse i is t i K, where k is the effective time window half-width.
Further, the time center point t i The calculation formula is specifically as follows:
t i ＝t 0 +T*(i-1)
wherein i is the number of optical pulses, t 0 The time difference between the detection of the light pulse by the receiver and the detection of the light pulse by the detector is calculated.
Further, k is less than or equal to T/2.
Further, the method for determining the effective time window half-width k specifically includes:
taking the value of k from a time window of T/2-0 according to a set step length to form a series of k values;
detecting the error rate and the counting rate corresponding to each k value;
and acquiring a k value of which the error rate change rate is smaller than a change rate threshold, and selecting the k value with the maximum counting rate from the acquired k values, wherein the k value is the value of the effective time window half-width k.
Further, the set step size is 10ps.
The present invention is achieved as such, a quantum key distribution system comprising:
a transmitting end and a receiving end, wherein the transmitting end includes: laser instrument and FPDA1, the receiving terminal includes: a detector, TDC, and FPDA2;
TDC is connected with the detector, FPDA2 is connected with TDC communication, and FPDA1 is connected with FPDA2 communication.
Further, a laser in the sending end sends out laser pulses, and the FPDA1 sends a starting signal to the FPDA2;
after the detector detects the optical pulse, the FPDA2 counts, and the TDC acquires the response time t of the detector to the optical pulse j And transmitted to the FPDA2, and the FPDA2 determines whether the pulse count is valid based on the quantum pulse intercept method of the TDC as claimed in any one of claims 1 to 7.
According to the invention, the response time of the detector is measured with high precision through the TDC, and the light pulse signal is intercepted according to a specific time window, so that the influence of pulse tailing can be eliminated, the quality of detection counting is improved, the bit error rate of a quantum key distribution system is reduced, and the safety key generation rate of the quantum key distribution system is further improved.
Drawings
FIG. 1 is a flow chart of a quantum pulse clipping method based on TDC according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a TDC-based quantum key distribution system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a pulse period according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.
Fig. 1 is a flowchart of a quantum pulse clipping method based on TDC according to an embodiment of the present invention, where the method specifically includes the following steps:
s1, when a detector is detected to have an optical pulse response signal, pulse counting is carried out, and meanwhile a TDC intercepts the response time t of the optical pulse j ；
The signal given by the detector can only determine the number of periods through sampling, and the response time in the period cannot be determined j Wherein, TDC, time-to-Digital ConverterAnd the time-to-digital conversion technology is used for measuring the interval between two time events and is used for measuring the time interval with high precision, and the precision reaches the picosecond (ps) level.
S2, calculating a pulse serial number i of the current light pulse, and determining a time window t where an effective signal segment of the current light pulse i is located based on the pulse serial number i ±k；
In an embodiment of the invention, the response time t based on the current light pulse j Calculating the serial number i of the current pulse, wherein the calculation formula is as follows:
wherein, t 0 The time difference between the detection of the light pulse by the receiver and the detection of the light pulse by the detector is a calibration value, T is the pulse period, as shown in fig. 3,
indicating rounding up.
In the embodiment of the invention, the time window t in which the effective signal segment of the current light pulse i is positioned i The specific method for determining +/-k is as follows:
s21, calculating the time center point t of the current light pulse i detected by the detector i The time center point refers to a detection time point of a light pulse peak value, and the calculation formula is as follows:
t i ＝t 0 +T*(i-1)
wherein i is the number of optical pulses, t 0 The time difference between the detection of the light pulse by the receiver and the detection of the light pulse by the detector is calculated.
S22, the time window of the effective signal section of the current optical pulse i is t i And +/-k, wherein k is the effective time window half width, and k is less than or equal to T/2.
S3, detecting time t j Whether or not to lie within the time window t i And +/-k, if the detection result is yes, the pulse counting is determined to be valid, otherwise, the pulse counting is trailing generation, and the pulse counting is determined to be invalid.
In the embodiment of the present invention, the error rate decreases with a decrease in the k value, and after the error rate decreases to a certain degree, the error rate tends to be balanced with a decrease in the k value, and the count rate decreases with a decrease in the k value, based on which the method for determining the effective time window half-width k provided by the embodiment of the present invention specifically includes:
taking the value of k from a time window of T/2-0 according to a set step length (for example, 10 ps) to form a series of k values;
detecting the error rate and the counting rate corresponding to each k value;
and acquiring a k value of which the error rate change rate is smaller than a change rate threshold, and selecting the k value with the maximum counting rate from the acquired k values, wherein the k value is the value of the effective time window half-width k.
Fig. 2 is a schematic structural diagram of a TDC-based quantum key distribution system according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown.
The system comprises: the transmitting terminal comprises: laser instrument and FPDA1, the receiving terminal includes: the device comprises a detector, a TDC and an FPDA2, wherein the TDC is connected with the detector, the FPDA2 is in communication connection with the TDC, and the FPDA1 is in communication connection with the FPDA2;
a laser in a sending end sends out laser pulses, and an FPDA1 sends a starting signal to an FPDA2;
after the detector detects the optical pulse, the FPDA2 counts the pulse, and meanwhile the TDC acquires the response time t of the detector to the optical pulse j And sending the pulse count to an FPDA2, wherein the FPDA2 determines whether the pulse count is valid or not based on the TDC quantum pulse interception method, and the quantum key distribution system can continuously acquire a coding random number and perform base pair and post-processing (bit error rate) operation based on the pulse sequence number of the valid pulse.
The invention has been described by way of example, and it is obvious that the invention is not limited to the embodiments described above, but it is within the scope of the invention to employ various insubstantial modifications of the inventive concepts and techniques, or to apply them directly to other applications without such modifications.
Claims (9)
1. A quantum pulse interception method of a TDC is characterized by comprising the following steps:
s1, when the detector is detected to have optical pulse signal response, pulse counting is carried out, and meanwhile, a TDC intercepts the response time t of the optical pulse j ；
S2, based on the response time t j Calculating the pulse serial number i of the current light pulse, and determining the time window t where the effective signal segment of the current light pulse i is located based on the pulse serial number i ±k；
S3, detecting time t j Whether or not to lie within the time window t i And +/-k, if the detection result is positive, the pulse counting is determined to be valid, otherwise, the pulse counting is tailing generation, and the pulse counting is determined to be invalid.
2. The method of claim 1, wherein the response time t is based on the current light pulse j Calculating the serial number i of the current pulse, wherein the calculation formula is as follows:
wherein, t 0 Which represents the time difference between the detection of the light pulse by the receiving end and the detection of the light pulse by the detector, and T is the pulse period.
3. The method of claim 1, wherein the valid signal segment of the current optical pulse i is located within a time window t i The method for determining +/-k is as follows:
s21, calculating the time center point t of the current light pulse i detected by the detector i ，；
S22, the time window of the effective signal section of the current optical pulse i is t i K, where k is the effective time window half-width.
4. Such asThe method of claim 2 wherein the TDC quantum pulse clipping process is characterized by a time center point t i The calculation formula is as follows:
t i ＝t 0 +T*(i-1)
wherein i is the number of optical pulses, t 0 The time difference between the detection of the light pulse by the receiver and the detection of the light pulse by the detector is calculated.
5. The method of claim 3 wherein k is T/2.
6. The method of claim 5, wherein the effective time window half width k is determined by:
taking the value of k from a time window of T/2-0 according to a set step length to form a series of k values;
detecting the error rate and the counting rate corresponding to each k value;
and acquiring a k value of which the error rate change rate is smaller than a change rate threshold, and selecting the k value with the maximum counting rate from the acquired k values, wherein the k value is the value of the effective time window half-width k.
7. The method of claim 6, wherein the set step size is 10ps.
8. A quantum key distribution system, the system comprising:
the transmitting terminal comprises: laser instrument and FPDA1, the receiving terminal includes: a detector, TDC, and FPDA2;
TDC is connected with the detector, FPDA2 is connected with TDC communication, and FPDA1 is connected with FPDA2 communication.
9. The quantum key distribution system of claim 8, wherein the laser in the transmitting end emits a laser pulse, and FPDA1 transmits a start signal to FPDA2;
after the detector detects the light pulse, the FPDA2Counting is carried out, and meanwhile, the TDC obtains the response time t of the detector to the optical pulse j And transmitted to the FPDA2, the FPDA2 determines whether the pulse count is valid based on the quantum pulse clipping method of the TDC as claimed in any one of claims 1 to 7.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116723054A (en) * | 2023-08-08 | 2023-09-08 | 合肥量芯科技有限公司 | Method for resisting detection efficiency mismatch loopholes introduced in calibration process |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013838A (en) * | 1976-04-05 | 1977-03-22 | Tonix Corporation | Telephonic enquiry system |
| US6137749A (en) * | 1996-04-02 | 2000-10-24 | Lecroy Corporation | Apparatus and method for measuring time intervals with very high resolution |
| CN101228753A (en) * | 2005-07-27 | 2008-07-23 | 松下电器产业株式会社 | Communication apparatus |
| CN101907866A (en) * | 2010-08-06 | 2010-12-08 | 北京交通大学 | Fault diagnosis method of fault safety system |
| CN104181544A (en) * | 2014-08-20 | 2014-12-03 | 国家电网公司 | Laser distance measuring method and system based on pulse counting and time expansion |
| CN108416176A (en) * | 2018-04-28 | 2018-08-17 | 珠海市微半导体有限公司 | The anti-interference method and circuit and chip of a kind of dram controller |
| CN108494493A (en) * | 2018-01-29 | 2018-09-04 | 南昌大学 | A kind of single photon signal of communication extraction element and method |
| CN110082808A (en) * | 2018-11-29 | 2019-08-02 | 绵阳市维博电子有限责任公司 | One kind is based on core pulse signal quick detection and recognition methods under complex background |
| CN110161463A (en) * | 2019-05-07 | 2019-08-23 | 上海酷芯微电子有限公司 | The method of Radar Signal Detection, system and medium in wireless communication system |
| CN110784222A (en) * | 2019-11-21 | 2020-02-11 | 珠海艾派克微电子有限公司 | ADC output curve generation method, device, equipment and medium |
| CN111431702A (en) * | 2020-02-28 | 2020-07-17 | 南昌大学 | Quantum encryption circuit system and method based on coincidence time |
| CN112736845A (en) * | 2020-12-31 | 2021-04-30 | 南京国电南自电网自动化有限公司 | CT trailing current identification method and device based on current phase angle difference calculation and failure protection method |
| CN113612611A (en) * | 2021-09-17 | 2021-11-05 | 上海循态量子科技有限公司 | Continuous variable quantum key distribution asynchronous sampling method and system |
| CN114325658A (en) * | 2021-12-31 | 2022-04-12 | 宁波未感半导体科技有限公司 | Laser radar interference resisting method, device, equipment and storage medium |
| CN114415144A (en) * | 2022-03-30 | 2022-04-29 | 杭州蓝芯科技有限公司 | Laser radar echo signal processing circuit, optical flight time measuring device and method |
-
2022
- 2022-07-12 CN CN202210819043.7A patent/CN115189763B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013838A (en) * | 1976-04-05 | 1977-03-22 | Tonix Corporation | Telephonic enquiry system |
| US6137749A (en) * | 1996-04-02 | 2000-10-24 | Lecroy Corporation | Apparatus and method for measuring time intervals with very high resolution |
| CN101228753A (en) * | 2005-07-27 | 2008-07-23 | 松下电器产业株式会社 | Communication apparatus |
| CN101907866A (en) * | 2010-08-06 | 2010-12-08 | 北京交通大学 | Fault diagnosis method of fault safety system |
| CN104181544A (en) * | 2014-08-20 | 2014-12-03 | 国家电网公司 | Laser distance measuring method and system based on pulse counting and time expansion |
| CN108494493A (en) * | 2018-01-29 | 2018-09-04 | 南昌大学 | A kind of single photon signal of communication extraction element and method |
| CN108416176A (en) * | 2018-04-28 | 2018-08-17 | 珠海市微半导体有限公司 | The anti-interference method and circuit and chip of a kind of dram controller |
| CN110082808A (en) * | 2018-11-29 | 2019-08-02 | 绵阳市维博电子有限责任公司 | One kind is based on core pulse signal quick detection and recognition methods under complex background |
| CN110161463A (en) * | 2019-05-07 | 2019-08-23 | 上海酷芯微电子有限公司 | The method of Radar Signal Detection, system and medium in wireless communication system |
| CN110784222A (en) * | 2019-11-21 | 2020-02-11 | 珠海艾派克微电子有限公司 | ADC output curve generation method, device, equipment and medium |
| CN111431702A (en) * | 2020-02-28 | 2020-07-17 | 南昌大学 | Quantum encryption circuit system and method based on coincidence time |
| CN112736845A (en) * | 2020-12-31 | 2021-04-30 | 南京国电南自电网自动化有限公司 | CT trailing current identification method and device based on current phase angle difference calculation and failure protection method |
| CN113612611A (en) * | 2021-09-17 | 2021-11-05 | 上海循态量子科技有限公司 | Continuous variable quantum key distribution asynchronous sampling method and system |
| CN114325658A (en) * | 2021-12-31 | 2022-04-12 | 宁波未感半导体科技有限公司 | Laser radar interference resisting method, device, equipment and storage medium |
| CN114415144A (en) * | 2022-03-30 | 2022-04-29 | 杭州蓝芯科技有限公司 | Laser radar echo signal processing circuit, optical flight time measuring device and method |
Non-Patent Citations (1)
| Title |
|---|
| 杨梦玲;苏新彦;王鉴;姚金杰;: "膛内目标有效信号自动提取方法", 激光与光电子学进展, no. 09 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116723054A (en) * | 2023-08-08 | 2023-09-08 | 合肥量芯科技有限公司 | Method for resisting detection efficiency mismatch loopholes introduced in calibration process |
| CN116723054B (en) * | 2023-08-08 | 2023-10-27 | 合肥量芯科技有限公司 | Method for resisting detection efficiency mismatch loopholes introduced in calibration process |
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